Why do i gain weight so fast?

Answeru probably gain weight fast because u have a (low) metabolism. Metabolism is the rate that ur body needs to brak down your foon. I have a high metabolism, so i burn my food faster than most ppl. Ppl who have a low metabolism don't break down their food as fast. It would be goodd 2 not eat as much, and get a lot of exercise, but talk 2 ur doc. first!